| | Why are we experiencing color shifting with our ABS parts? |
| | Our company runs P/P closures with and without nucleating agents. Why does the red we use change color to orange when used with nucleated P/P? |
| | After running fluorescent colors my mold has severe plate out - Can this be eliminated? |
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| Q: | Why are we experiencing color shifting with our ABS parts? |
| A: | This is primarily due to the lot-to-lot inconsistencies of the yellow index of ABS. Although great strides have been made to reduce this by manufacturing ABS on a continuous versus batch process the problem still exists. When color matching for ABS there are certain formulating procedures that eliminate this problem.
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| Q: | Our company runs P/P closures with and without nucleating agents. Why does the red we use change color to orange when used with nucleated P/P? |
| A: | Certain red pigments are incompatible with the nucleating agents. They will cause some reds to change to orange. Chroma has the knowledge to formulate the color so it can be used in both resins without the color change.
Another tip on nucleated polypropylene: These products are designed to promote crystallinity and a more uniform crystalline structure in the polymer. The benefit to the molder is a faster cycle. Color compounders typically use metal stearates as pigment dispersion aides. These metal stearates will neutralize the nucleating agent rendering them useless in the function they were designed for.
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| Q: | After running fluorescent colors my mold has severe plate out - Can this be eliminated? |
| A: | Yes! Plate out is common with fluorescent colors, but can be minimized. The solution is all in the formulation. When formulating all the factors that effect fluorescents need to be considered - the machines, temperature, cycle times, and the final part.
Chroma has developed a proprietary plate out package that virtually eliminates the staining of the mold, screw and barrel.
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